Conformal holography with curved light sheets

Projecting images onto arbitrary curved surfaces is a sought-after goal in computer-generated holography applications. However, achieving high axial resolution with a low level of cross-talk using a single computer-generated hologram is still challenging. Here we propose and demonstrate a new type of holographic technique that projects conformal images onto two-dimensional arbitrarily shaped curved sheets oriented perpendicular to the display. These curved sheets are constructed from an array of non-diffracting light threads, each one with its intensity controlled by a superposition of Bessel beams, providing us with a continuous depth along the optical path. Our holograms present good reconstruction quality, opening new applications in laser beam shaping and light-matter interaction.